I'm writing code for a cython module, but right now I'm doing it in
the sage worksheet for convenience. This means that I don't have
access to sage's arg(complex number) function. Therefore, I decided to
use the cmath module's "phase(x)" function which does the same thing.
When I import cmath, however, I only get the trig functions. According
the the cmath documentation, phase and a couple other functions (which
also don't show up) are new to cmath version 2.6.2. This implies sage
is using an older version. I ran python from a terminal and was able
to use the cmath.phase function, so my computer at least has it
installed.  I have sage version 4.0.1
So, 3 questions:

1: Is there a reason not to have the latest cmath version with sage?

2: Is there some way I can update my cmath module without rebuilding
all of sage?

3: If not, does anyone know of another package that defines an arg/
phase fucntion (preferably numeric rather than symbolic)

Thanks,

Ethan
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